Results 11 to 20 of about 364,563 (296)
Aspects of energy requirements for rock drilling [PDF]
, 1974 Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
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Hawaii Scientific Drilling Project 1993 [PDF]
, 1994 Content: Project Summary, History of Hawaii Project, Permit History, Continental Scientific Drilling Office's Role, Setup and Coring of Kahi Puka Site, Downhole Problems, Cures for Problems, Conclusions, Appendices: Correspondence for Increase in Depth ...
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Induced drilling strains in glass fibre reinforced epoxy composites [PDF]
, 2013 Residual strains induced by drilling of glass-fibre reinforced polymers (GFRP) were determined using a hybrid experimental-numerical methodology. Experimentally, a set of GFRP specimens were drilled under well-defined tensile (calibration) stresses ...
STIFFEL, J.-H. +16 more
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Tool wear monitoring and hole surface quality during CFRP drilling [PDF]
, 2014 The present investigation focuses on the evaluation of tool wear and surface integrity in the context of CFRP cutting. Series of drilling experiments were performed on CFRP plates using cemented carbide solid drills with the aim to investigate ...
RAMIREZ, Christophe +3 more
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Meikuang Anquan, 2020 Aiming at the problems such as low efficiency and depth limit of directional drilling caused by the support pressure of drilling tools in the directional drilling of ultra-deep hole in underground coal mine, learning from the twist drilling technology ...
JIANG Lei, XU Chao, LI Quanxin, WANG Xian
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Evaluation of the performance of coated and uncoated carbide tools in drilling thick CFRP/aluminium alloy stacks [PDF]
, 2013 This paper aims to establish the wear mechanisms of coated and uncoated tungsten carbide drills when drilling carbon fibre reinforced plastics (CFRP)/aluminium alloy (Al) stacks. During the drilling experiments, thrust forces were measured.
MONTOYA, Maxime +3 more
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Semantic-Preserving Mesh Direct Drilling [PDF]
2010 Shape Modeling International Conference, 2010 Advances in modeling of discrete models have allowed the development of approaches for direct mesh modeling and modification. These tools mainly focus on modeling the visual appearance of the shape which is a key criterion for animation or surgical simulation.
Ruding Lou +6 more
openaire +7 more sources
Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]
, 2008 Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu +3 more
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Petroleum Exploration and Development, 2013 In order to address the contradiction between drilling safety and coalbed damage control, a degradable drilling-in fluid (DIF) was developed for complex structure wells in coalbed methane (CBM) reservoirs.
Dawei LIU +5 more
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Drag Reduction Technology of Ultra-long Directional Drilling and Its Application
Meikuang Anquan, 2020 In view of the problems such as high resistance, low efficiency and limited drilling depth during the sliding directional drilling under the condition of deep hole, this paper studies and forms the drag reduction technology of sliding drilling, including
WANG Xian, JIANG Lei, LI Quanxin, XU Chao
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